Imperial College London
Portrait Picture

DrEmilioMartinez-Paneda

Faculty of Engineering, Department of Civil and Environmental Engineering

Visiting Reader
 
 
 
//

Contact

 

+44 (0)20 7594 8188e.martinez-paneda Website

 
 
//

Location

 

249Skempton BuildingSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Díaz:2020:10.1016/j.ijhydene.2020.05.192,
author = {Díaz, A and Cuesta, II and Martínez-Pañeda, E and Alegre, JM},
doi = {10.1016/j.ijhydene.2020.05.192},
journal = {International Journal of Hydrogen Energy},
pages = {23704--23720},
title = {Influence of charging conditions on simulated temperature-programmed desorption for hydrogen in metals},
url = {http://dx.doi.org/10.1016/j.ijhydene.2020.05.192},
volume = {45},
year = {2020}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Failures attributed to hydrogen embrittlement are a major concern for metals so a better understanding of damage micro-mechanisms and hydrogen diffusion within the metal is needed. Local concentrations depend on transport phenomena including trapping effects, which are usually characterised by a temperature-programmed desorption method often referred to as Thermal Desorption Analysis (TDA). When the hydrogen is released from the specimen during the programmed heating, some desorption peaks are observed that are commonly related to detrapping energies by means of an analytical procedure. The limitations of this approach are revisited here and gaseous hydrogen charging at high temperatures is simulated. This popular procedure enables attaining high concentrations due to the higher solubility of hydrogen at high temperatures. However, the segregation behaviour of hydrogen into traps depends on charging time and temperature. This process and the subsequent cooling alter hydrogen distribution are numerically modelled; it is found that TDA spectra are strongly affected by the charging temperature and the charging time, both for weak and strong traps. However, the influence of ageing time at room temperature after cooling and before desorption is only appreciable for weak traps.
AU  - Díaz,A
AU  - Cuesta,II
AU  - Martínez-Pañeda,E
AU  - Alegre,JM
DO  - 10.1016/j.ijhydene.2020.05.192
EP  - 23720
PY  - 2020///
SN  - 0360-3199
SP  - 23704
TI  - Influence of charging conditions on simulated temperature-programmed desorption for hydrogen in metals
T2  - International Journal of Hydrogen Energy
UR  - http://dx.doi.org/10.1016/j.ijhydene.2020.05.192
UR  - https://www.sciencedirect.com/science/article/pii/S0360319920320206
UR  - http://hdl.handle.net/10044/1/80856
VL  - 45
ER  -
Download